Pipe-wrench attachment for monkey-wrenches.



W. 'BSTERBBM l PPEl WRENCH' ATTAGHMBNT OR MONKEY W-EENCHES.

Patented Maf. 1,1, 19153 i .'-To all whom/2f may concern:

UNITED sTiyrEs PATENT naaien,

'TWIL'LIAM nsrnmsnns, 0F sTooKToN, CALIFORNIA, AssIGNoRoF ONE-HALF froFRA-Nels CUTTING, or sTocKToN, CALIFORNIA. 4

PIPE-waait a.

Aipuc'ation inea Aprn' 15, 1912. serial No. 690,939.

` Beit known that I, WILLIAM v'STERBERG,

- 'afeitizen ot the United YAStates, residing at Stocktomin the countyfoSan Joaquin and State 'of' California7 have invented new and Y, .usefulImprovements in Pipe-VVrench- Attachments for MonkeyJVrenehes,`of whichthe followingv is'afspeciiication, p

.My' invention.- relates to' van' attachn'ient especially Vdesigned forvuse in combination with monkey wrenches. n It consists of a jaw havingits face formed j to serve asa pipe Wrench, and lmeans by 'faja 'A whichthis jaw may be' eciently attached 1.5.

jayvsof the wrench.

to,,.and"'readily removed-from one of the S L also @comprises detailsof: construction whihhwill be more fully explained by ref{terence-tothe' accompanying drawings in '.wh'lchei'gura--L is a view ofthe wrench showing improved attachmentin place.; .Fig. 2 is 'anerspective'vi'ew of the attachment. i

Asash'ownin the, drawings, A is a Wrench character known as monkeyyvre'nches 27,. having the inner'andouter jaws 2' and "8; -Wrenches of.this character are eicintfor .the holdingor turningrof nuts f or'articles having polygonal aces,'.but for. 3.o' lindrical object theydo. not have suiicient' the purpose of' holdingor turning aV cygrip, onaccount'ofiheimpossibility of forcing thel iavvs together Awith suicientpressure, and for the purpose'uof turning rods or pipesfit is necessarytorhave a gripping attachmentl of some character. Wrenchesa-rejtherefore, made havingsuch gripping jaws as a Apermanent part oftheir'structure, but forthepurp'ose of general use I haveV designed ameans for applying a corrugated jaw Whenverneeded and which is readil`removable when the wrench" is design rIhis mzte'nsion is turned over,asshown at and'again turned to form a hooked pot'- Speeiification ofLetters Patent. i

for ordinary purposes. 4 represents a face of this jaivgthe, .lengthand. breadthA of. this. portion being "such a's'to' coincide.ATTACHMENT-FOR MONKEYLWRCHES. l

, Patented Mar. Ii, 1913;

tion, as at 6, which is adapted'to tit the tapered outer end,7 of thejaw 3.

At one side of the base or innerend of l. y

the part 4 is an extension 8 having a depth ing. Through vthe portion 4vof this supplemental jaw, extends a vshank l1 which may bescrew-threaded onthe inside to tit the corresponding screw/threadedportion of the part 4. This shank has upon its outer end a thumb piecel2 by which it may be turned. l

The -device is readily applied to' the wrench as follows: The jaws being.sepa-- rated sutlicie'ntly 'for the purpose, the'part his attached tothe shank and jaw of the y wrench. by slipping the projecting tongues(iV and 10 over thev tip'of the Jaw and the 'shank 9 respectively, andapplying them so that' the open side of the .jaw 4 will pass over theshank 9; the thumb piece 12 standing substantially in line with the part4 i while this application is being made. After 'the' supplemental jawhas been thus placed,

the thumb piece 12 is turned to engage with y ltheco'ntiguous side ofthe jaw 3; this shank being screwed in at the same time' so that aperfect'lock .is formed and the jaw is as solid as if a part of the mainjaw. In this .way I am enabled'toefficiently apply a de- Avice to form apipe wrench, and to readily 'remove it lwhen the wrench is desired forotherC purposes. l t

v These attachments are cheaply formed and may be applied to wrenches ofany size of this class.'

Having -thusv describedy `my invention,

what I claimcand desire to Secure by Ilet-l ters .Patent is- A. 1

A ppewrench attachment for monkey vvvreniehes, consisting of a toothedjaw adapted to register with the inner face of the main jaw of thewrench, said toothed j w .having a forward extensionand a turnedover'portion fitting the' tip of the main jaW ofthe wrench, a rear extensionfrom one side of said toothed jaw adapted to lie adjan testimony whereofI have hereunto set cent the side of the shank of the monkey my handn-thepresence oftwo subscribing Wrench, a projecting toe upon said rearexwltnesses.

tension, and a, thumb piece carried by said Y WILLAM ESTERBERG. 5toothed4 jaw and adapted to engage the main Wtnesseszjaw of said monkeyWrench to hold said at FRANCIS CUTTING,

catchment in place. L. MILTON CUTTING.

Copies ni' this patent may be obtained for ve cents each, by addresingthe Commissioner of Patents,

Y Washington, D. C.

